Process for preparing a polymer composition, and polymer composition obtainable by said process

Patent metadata

Field	Value
Publication number	US-2018201731-A1
Application number	US-201615744263-A
Country	US
Kind code	A1
Filing date	Jul 22, 2016
Priority date	Jul 29, 2015
Publication date	Jul 19, 2018
Grant date	—

Abstract

The invention relates to a process for preparing a polymer composition, comprising a blending step wherein a first polymer (component A1) and at least one further component are dosed into and mixed in a mixing apparatus, and wherein the first polymer A1 is a granulate polyamide material directly obtained by direct solid state polymerization of a diammonium dicarboxylate salt prepared by fluidized bed spray granulation. The invention also relates to a dry-blend obtainable by said process.

First claim

1 . Process for preparing a polymer composition, comprising a blending step wherein a first polymer and at least one further component are dosed into and mixed in a mixing apparatus, and wherein the first polymer A1 is a granulate polyamide material directly obtained by direct solid state polymerization of a diammonium dicarboxylate salt prepared by fluidized bed spray granulation.

2 . Process for preparing a polymer composition, comprising steps of:
(i) Preparing a first polymer A1 by direct solid state polymerization of a diammonium dicarboxylate salt prepared by fluidized bed spray granulation, thereby obtaining the first polymer A1 as a granulate polyamide material, and (ii) Preparing a polymer composition, comprising a blending step wherein the granulate polyamide material of the first polymer, obtained from step and at least one further component are dosed into and mixed in a mixing apparatus.

3 . Process for preparing a polymer composition, comprising steps of:
(a) Preparing a diammonium dicarboxylate salt solution by dissolving a diamine and a dicarboxylic acid in water or in an aqueous solvent; (b) Preparing a diammonium dicarboxylate salt granulate material by fluidized bed spray granulation of the diammonium dicarboxylate salt solution obtained in step a; (c) Preparing a first polymer A1 by direct solid state polymerization of the diammonium dicarboxylate salt granulate material obtained from step b, thereby obtaining the first polymer A1 as a granulate polyamide material, and (d) Preparing a polymer composition, comprising a blending step wherein the granulate polyamide material of the first polymer, directly obtained from step c and at least one further component are dosed into and mixed in a mixing apparatus.

4 . Process according to claim 1 , wherein the process is a dry-blending process, the mixing apparatus is a stirred reactor or a rotating vessel, or a combination thereof, and the resulting blend is a dry-blend.

5 . Process according to claim 1 , wherein
the mixing apparatus is a melt-mixing apparatus; the process comprises a melt-mixing step, wherein the polymer granulate material is dosed into the melt-mixing apparatus and melted in the melt-mixing apparatus to form a polymer melt; the one or more further components are dosed before, during or after melting of the granulate polyamide material, into the melt-mixing apparatus and mixed with the polymer melt, thereby forming a melt-blend of molten polymer with the one or more further components mixed or dispersed therein; and wherein the melt-blend is discharged from the melt-mixing apparatus and cooled, thereby obtaining the blend in the form of a solid composite material.

6 . Process according to claim 5 , wherein the melt-mixing apparatus is an extruder.

7 . Process according to claim 5 , wherein the melt-blend is discharged by extruding the melt-blend through a die with one or more orifices, thereby forming polymeric strands.

8 . Process according to claim 5 , wherein the melt-blend is discharged by extruding the melt-blend through a die with a die slit, thereby forming a polymer sheet or polymer film.

9 . Process according to claim 5 , wherein the melt-blend is discharged by extruding the melt-blend into a mold with a three-dimensional cavity, cooling and solidifying the melt-blend in the mold, thereby forming a three-dimensional part and discharging the three-dimensional part from the mold.

10 . Process according to claim 5 , wherein the granulate polyamide material is mixed and melt-blended with a second polyamide polymer, miscible with the granulate polyamide material, resulting in a copolymer between the second polyamide and the granulate polyamide material being formed in the extruder.

11 . Process according to claim 1 , wherein the granulate polyamide material has a particle size distribution with a median particle size in the range of 200-1000 μm, measured by laser granulometry with the method according to ISO 13320-1 at 20° C.

12 . Process according to claim 1 , wherein the granulate polyamide material A1 comprises
a semi-aromatic polyamide, or an aliphatic polyamide, or an aromatic polyamide, or any copolyamide or any mixture thereof.

13 . Process according to claim 1 , wherein the at least one further component comprises
a second polymer component; or at least one component selected from the groups consisting of reinforcing agents and fillers; flame retardants and flame retardant synergists; stabilizers, pigments, colorants, processing aids and further auxiliary additives used in polyamide moulding compositions; or a combination thereof.

14 . Polymer composition consisting of a blend of a polymer and at least one further component, wherein the blend is a dry-blend comprising a granulate polyamide material obtained by direct solid state polymerization of a diammonium dicarboxylate salt prepared by fluidized bed spray granulation.

15 . Polymer composition according to claim 14 , wherein the dry-blend comprises a granulate polyamide material, and
a second polymer component; or at least one component selected from the groups consisting of reinforcing agents and fillers; flame retardants and flame retardant synergists; stabilizers, pigments, colorants, processing aids and further auxiliary additives used in polyamide moulding compositions; or a combination thereof.

Assignees

• Dsm Ip Assets Bv

Inventors

• Van Dijk Hans Klaas
• Baltussen Michiel Gerardus Henricus Maria

Classifications

• C08G69/30 Primary

  Solid state polycondensation · CPC title

• C08G69/46

  Post-polymerisation treatment · CPC title

• B29K2077/00

  Use of {PA, i.e.} polyamides, e.g. polyesteramides {or derivatives thereof}, as moulding material · CPC title

• B29C48/022

  characterised by the choice of material · CPC title

• C08J3/005

  Processes for mixing polymers · CPC title